I had a Motorola Razor cell phone for over 6 years, but recently had to get a smartphone (Samsung Galaxy S-5) to be able to fly my Phantom drone. In case anyone is looking for a good GPS app to get their present speed and maximum speed, I can recommend the digiHUD at least for the Android phones - and its a free app. Lots of features and very quick to get your present speed and maximum speed. Now I can compare the pitot tube speedometer to GPS speed without having to buy and install a GPS speedometer. Just thought I would pass this along.